Now first off, I am not familiar with Kubota's new B series. But, I shopped the B7610 against the 2320. I went green. One of the biggest reasons was the height adjustability of the mower deck on the 2320. It was way easier and had more options/positions than the Kubota. The dial on the Deere makes it a snap. I have also watched my neighbor take of his 60"MMM on his B7510 and can say my Deere's drive over deck is awesome! Maybe it has changed on the new B series, but I just thought I would point it out. My 3 acres of yard is flat, so the two range trannie isn't an issue for me. Good Luck.